Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/27050

TitleNaCl and KCl phase diagrams of kappa/iota-hybrid carrageenans extracted from Mastocarpus stellatus
Author(s)Azevedo, Gabriela
Bernardo, Gabriel
Hilliou, L.
KeywordsHybrid carrageenan
Potassium
Sodium
Sol gel transition
Rheology
Issue date2014
PublisherElsevier
JournalFood hydrocolloids
Abstract(s)The phase diagrams of kappa/iota-hybrid carrageenan (KI) in KCl and NaCl are reported for the first time, together with the large strain properties of obtained KI gels. KI shows salt specificity as phase diagrams in KCl and NaCl are different. These diagrams do not comply with those of a mixture of kappa- and iota-carrageenan (K + I). Concentrated KI solutions in NaCl up to 0.3 mol/L exhibit viscoelastic properties reminiscent from entangled neutral polymers with no aggregation. Both KI and K + I gels are strain hardening, and show a concentration scaling of the elasticity with exponents ranging from 1.2 to 3.2 depending on the type of salt and ionic strength. The strain at break of KI gels does not show salt specificity in contrast to K + I gels. In NaCl, KI gels are less brittle than K + I gels. In KCl, KI gels show the same level of strain at break as the corresponding carrageenan mixture.
TypeArticle
Description"Accepted 31 October 2013"
URIhttp://hdl.handle.net/1822/27050
DOI10.1016/j.foodhyd.2013.10.029
ISSN0268-005X
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S0268005X13003469
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

Files in This Item:
File Description SizeFormat 
FH phase diagram 2014.pdf
  Restricted access
author copy1,26 MBAdobe PDFView/Open    Request a copy!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID